diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 4c4ecd5c4c7..0d85d0232ca 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+Tue Feb 29 18:09:46 2000  Andrew Cagney  <cagney@b1.cygnus.com>
+
+	* arm-tdep.c: Include <ctype.h>.
+
 Tue Feb 29 17:33:49 2000  Andrew Cagney  <cagney@b1.cygnus.com>
 
 	From Wed, 23 Feb 2000 Fernando Nasser <fnasser@redhat.com>:
diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index edacf985ace..eaaa19cedfc 100644
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -28,6 +28,7 @@
 #include "gdb_string.h"
 #include "coff/internal.h"	/* Internal format of COFF symbols in BFD */
 #include "dis-asm.h"		/* For register flavors. */
+#include <ctype.h>		/* for isupper () */
 
 extern void _initialize_arm_tdep (void);